System and method for brand monitoring and trend analysis based on deep-content-classification

ABSTRACT

A system and method for matching an advertisement item to a multimedia content element based on sentiments. The method comprises: extracting at least one multimedia content element from a web-page requested for display on a user node; generating a signature for each of the at least one multimedia content element, wherein each signature represents a concept, wherein each concept is an abstract description of one of the at least one multimedia content element; correlating the concepts of the generated signatures to determine a context of the at least one multimedia content element, wherein the context indicates at least a brand sentiment; searching for at least one advertisement item based on the signatures and the context; and causing a display of the at least one advertisement item within a display area of the web-page.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No. 13/874,115 filed on Apr. 30, 2013, now allowed, which claims the benefit of U.S. provisional application No. 61/789,576 filed on Mar. 15, 2013 and is a continuation-in-part (CIP) of U.S. patent application Ser. No. 13/624,397 filed on Sep. 21, 2012, now U.S. Pat. No. 9,191,626. The Ser. No. 13/624,397 application is a CIP of:

(a) U.S. patent application Ser. No. 13/344,400 filed on Jan. 5, 2012, now U.S. Pat. No. 8,959,037, which is a continuation of U.S. patent application Ser. No. 12/434,221 filed on May 1, 2009, now U.S. Pat. No. 8,112,376. The Ser. No. 12/434,221 Application is a CIP of the below-referenced U.S. patent application Ser. Nos. 12/195,863 and 12/084,150. The Ser. No. 13/344,400 Application is also a CIP of the below-referenced U.S. patent application Ser. Nos. 12/195,863 and 12/084,150;

(b) U.S. patent application Ser. No. 12/195,863, filed on Aug. 21, 2008, now U.S. Pat. No. 8,326,775, which claims priority under 35 USC 119 from Israeli Application No. 185414, filed on Aug. 21, 2007, and which is also a continuation-in-part of the below-referenced U.S. patent application Ser. No. 12/084,150; and,

(c) U.S. patent application Ser. No. 12/084,150 having a filing date of Apr. 7, 2009, now U.S. Pat. No. 8,655,801, which is the National Stage of International Application No. PCT/IL2006/001235, filed on Oct. 26, 2006, which claims foreign priority from Israeli Application No. 171577 filed on Oct. 26, 2005 and Israeli Application No. 173409 filed on 29 Jan. 2006.

All of the applications referenced above are herein incorporated by reference for all that they contain.

TECHNICAL FIELD

The present invention relates generally to the analysis of multimedia content displayed in web-pages, and more specifically to a system for identifying trends, and analysis of multimedia content associated brands displayed in web-pages.

BACKGROUND

The World Wide Web (WWW) contains a variety of multimedia content which is commonly used by advertisers in order to promote different brands. Such advertisers commonly use a variety of web platforms while trying to track the performance of their brands. The web platforms include, for example, social networks, banners in popular websites, advertisements in video clips, and so on.

As many web platforms are used as means for advertising, it has become more difficult to track the performance and efficiency of each web platform with regard to an advertisement or a practical brand. Furthermore, as the brands' sentiment cannot be determined in real-time it is highly difficult to track the trendiness of a brand's sentiment, for example, the tracking of the users' likes or dislikes of a practical brand at any given time.

It would be therefore advantageous to provide a solution for trend analysis of brands advertised through the various the web platforms.

SUMMARY

Certain embodiments disclosed herein include a method for matching an advertisement item to a multimedia content element based on sentiments. The method comprises: extracting at least one multimedia content element from a web-page requested for display on a user node; generating a signature for each of the at least one multimedia content element, wherein each signature represents a concept, wherein each concept is an abstract description of one of the at least one multimedia content element; correlating the concepts of the generated signatures to determine a context of the at least one multimedia content element, wherein the context indicates at least a brand sentiment; searching for at least one advertisement item based on the signatures and the context; and causing a display of the at least one advertisement item within a display area of the web-page.

Certain embodiments disclosed herein also include a system for matching an advertisement item to a multimedia content element based on sentiments. The system comprises a processing unit; and a memory, the memory containing instructions that, when executed by the processing unit, configures the system to: extract at least one multimedia content element from a web-page requested for display on a user node; generate a signature for each of the at least one multimedia content element, wherein each signature represents a concept, wherein each concept is an abstract description of one of the at least one multimedia content element; correlate the concepts of the generated signatures to determine a context of the at least one multimedia content element, wherein the context indicates at least a brand sentiment; search for at least one advertisement item based on the signatures and the context; and cause a display of the at least one advertisement item within a display area of the web-page.

BRIEF DESCRIPTION OF THE DRAWINGS

The disclosed subject matter is particularly pointed out and distinctly claimed in the claims at the conclusion of the specification. The foregoing and other objects, features, and advantages of the invention will be apparent from the following detailed description taken in conjunction with the accompanying drawings.

FIG. 1 is a schematic block diagram of a network system utilized to describe the various embodiments disclosed herein;

FIG. 2 is a flowchart describing the process of matching an advertisement to multimedia content displayed on a web-page;

FIG. 3 is a block diagram depicting the basic flow of information in the signature generator system;

FIG. 4 is a diagram illustrating the flow of patches generation, response vector generation, and signature generation in a large-scale speech-to-text system; and

FIG. 5 is a flowchart describing a method for determining a sentiment with respect to a brand according to one embodiment.

DETAILED DESCRIPTION

It is important to note that the embodiments disclosed herein are only examples of the many advantageous uses of the innovative teachings herein. In general, statements made in the specification of the present application do not necessarily limit any of the various claimed inventions. Moreover, some statements may apply to some inventive features but not to others. In general, unless otherwise indicated, singular elements may be in plural and vice versa with no loss of generality. In the drawings, like numerals refer to like parts through several views.

Certain exemplary embodiments disclosed herein allow analyzing one or more multimedia content elements to identify the existence of a brand advertised or otherwise displayed through a plurality of web platforms. For each identified multimedia content element at least one signature is generated. The signatures are utilized to determine a brand's sentiment. The determined sentiment may be a positive, a natural or negative sentiment. The determined brand's sentiment is stored in a database. The determination of the brand's sentiment may be based in part, on an identification of a volume appearance of the brand or one or more items related to the brand within the multimedia content, a context in which the brand is appeared, and so on. The trendiness of a brand's sentiment is determined respective of its previously determined sentiments as stored in the database.

FIG. 1 shows an exemplary and non-limiting schematic diagram of a network system 100 utilized to describe the various embodiments disclosed herein. A network 110 is used to communicate between different parts of the system 100. The network 110 may be the Internet, the world-wide-web (WWW), a local area network (LAN), a wide area network (WAN), a metro area network (MAN), and other networks capable of enabling communication between the elements of the system 100.

Further connected to the network 110 are one or more client applications, such as web browsers (WB) 120-1 through 120-n (collectively referred to hereinafter as web browsers 120 or individually as a web browser 120). A web browser 120 is executed over a computing device including, for example, a personal computer (PC), a personal digital assistant (PDA), a mobile phone, a smart phone, a tablet computer, and other kinds of wired and mobile appliances, equipped with browsing, viewing, listening, filtering, and managing capabilities etc., that are enabled as further discussed herein below.

The system 100 also includes a plurality of servers 150-1 through 150-m (collectively referred to hereinafter as servers 150 or individually as server 150) being connected to the network 110. Each of the servers 150 may be, for example, a web server, an application server, a publisher server, an ad-serving system, a data repository, a database, and the like. Also connected to the network 110 is a data warehouse 160 that stores multimedia content elements, clusters of multimedia content elements, and the context determined for a web page as identified by its URL. In the embodiment illustrated in FIG. 1, a brand-analyzer 130 communicates with the data warehouse 160 through the network 110. In other non-limiting configurations, the brand-analyzer 130 is directly connected to the data warehouse 160.

The various embodiments disclosed herein are realized using the brand-analyzer 130 and a signature generator system (SGS) 140. The SGS 140 may be connected to the brand-analyzer 130 directly or through the network 110. The brand-analyzer 130 is enabled to receive and serve multimedia content elements and causes the SGS 140 to generate a signature respective of the multimedia content elements. The process for generating the signatures for the multimedia content elements is explained in greater detail herein below with respect to FIGS. 3 and 4. It should be noted that each of the brand-analyzer 130 and the SGS 140, typically comprises a processing unit, such as a processor (not shown) that is coupled to a memory. The memory contains instructions that can be executed by the processing unit. The transaction of the brand-analyzer 130 also includes an interface (not shown) to the network 110. According to one embodiment, the brand- analyzer 130 is a server system.

According to the disclosed embodiments, the brand-analyzer 130 is configured to receive at least a URL of a web page hosted in the server 150 and accessed by a web browser 120. The brand-analyzer 130 is further configured to analyze the multimedia content elements contained in the web page to determine their context, thereby ascertaining the context of the web page. This is performed based on at least one signature generated for each multimedia content element. It should be noted that the context of an individual multimedia content element or a group of elements is extracted from the web page, received from a user of a web browser 120 (e.g., uploaded video clip), or retrieved from the data warehouse 160.

According to the embodiments disclosed herein, a user visits a web-page using a web browser 120. When the web-page is uploaded on the user's web browser 120, a request is sent to the brand-analyzer 130 to analyze the multimedia content elements contained in the web-page. The request to analyze the multimedia content elements can be generated and sent by a script executed in the web-page, an agent installed in the web-browser, or by one of the servers 150 (e.g., a web server or a publisher server) when requested to upload one or more advertisements to the web-page. The request to analyze the multimedia content may include a URL of the web-page or a copy of the web-page. In one embodiment, the request may include multimedia content elements extracted from the web-page. A multimedia content element may include, for example, an image, a graphic, a video stream, a video clip, an audio stream, an audio clip, a video frame, a photograph, an image of signals (e.g., spectrograms, phasograms, scalograms, etc.), and/or combinations thereof and portions thereof.

The brand-analyzer 130 analyzes the multimedia content elements in the web-page to determine if they are associated with a particular brand. As an example, if the web page contains an image of a bar, the image is analyzed to determine if it contains a logo of a brand-name lager. The logo may appear, for example, on beer glasses or on a signboard. Then at least one signature is generated by means of the SGS 140 for the identified brand. The generated signature(s) may be robust to noise and distortion as discussed below.

Then, using the generated signature(s) the brand-analyzer 130 searches for multimedia content elements containing the identified brand. The search may be performed by crawling the plurality of servers 150 and/or the data warehouse 160. In one embodiment, for each multimedia content element encountered during the search, at least one signature is generated which is compared to the signature of a multimedia element identifying the brand. If the signatures are substantially then the encountered multimedia content element is determined to be related to the brand. For example, a predefined number of least significant bits should be the same in the compared signatures.

The at least one signature generated for any multimedia content element that relates to the brand represents a concept. A concept is an abstract description of the content to which the signature was generated. As an example, a concept of the signature generated for a picture showing a bouquet of red roses is “flowers”. As another example, a concept of the signature generated for a picture showing a bouquet of wilted roses is “wilted flowers”. According to these examples a correlation between the concepts can be achieved by probabilistic models to determine that the concept of “Flowers” has a positive connotation in comparison to the concept “wilted flowers”. Moreover, the correlation between concepts can be achieved by identifying a ratio between signatures' sizes, a spatial location of each signature, and so on using the probabilistic models.

As an example, according to an image analysis, a logo of a brand-name lager is identified on a beer glass in a bar and a tequila bottle sign is identified on a signboard at the entrance to the bar. Signatures are generated for the brand-name lager and the tequila sign. Because a generated signature represents a concept and is generated for a multimedia content element, the signature can also be utilized to determine if somehow the brand-name lager is liked or disliked. Such determination is possible, for example, respective of the identification of the ratio between the signatures' sizes (the brand-name lager compared with the tequila sign) and the spatial location of the brand-name lager compared with the tequila sign. According to this example, the brand of the tequila sign is probably more significant than the brand-name lager because the size of the sign and the signboard's location in the image are more significant than the lager's logo presented on the beer glass. It should be noted that identifying, for example, the ratio of signatures' sizes may also indicate the ratio between the sizes of their respective multimedia elements.

The brand-analyzer 130 then analyzes the signatures to correlate between their respective concepts and to determine a context of such a correlation. The context represents the brand sentiment. According to one embodiment, the determined sentiment may be a positive, natural, or negative sentiment. Because a context is the correlation between a plurality of concepts, a strong context is determined when there are more concepts than a predefined threshold which satisfy the same predefined condition.

An exemplary technique for determining the context from signatures generated for multimedia content elements is described in detail in U.S. patent application Ser. No. 13/770,603, filed Feb. 19, 2013, which is assigned to the common assignee, and is hereby incorporated by reference for all the useful information it contains.

Following is a non-limiting example for the operation of the brand-analyzer 130. An input image including a logo of the brand Gucci is received. A first signature is generated for the “Gucci” logo. Then, the brand-analyzer 130 crawls through one or more web sources in order to identify mentions of Gucci. Examples for such mentions include pictures of models wearing a Gucci Jacket, and/or fans commenting on such pictures through social media websites. The brand-analyzer 130 then generates at least one signature for any mention of the brand. For instance, the crawling process encountered a picture of model Kate Moss wearing Gucci sunglasses and a comment made by a fan of Kate Moss to a picture. A signature is generated for each such mention. That is, a first signature is generated for the Gucci logo (representing a first concept), a second signature is generated of Kate Moss's picture (representing a second concept), and a third signature is generated of the fan's comment (representing a third concept). The brand-analyzer 130 analyzes and correlates the first, second, and third signatures to determine the context of all the respective multimedia content elements. The context represents the sentiment of the brand.

In should be understood that the brand-analyzer 130 generates at least one signature for each identified comment, thus a plurality of comments may represent a plurality of concepts. Next, a correlation between the concepts is identified to determine, for example, if the sentiment of the brand is positive or negative, natural, popular, and so on. If the brand-analyzer 130 identifies a large number of comments mentioned respective of a certain brand, this may indicate that the brand is very popular. A sentiment of the brand's popularity can be positive, natural or negative depending, for example, on the content of the identified comments and the signatures generated thereof, the context in which the comments are made, and so on.

It should be further noted that using signatures for determining the context and thereby for the searching of advertisements ensures more accurate reorganization of multimedia content than, for example, when using metadata. For instance, in order to provide a matching advertisement for a sports car it may be desirable to locate a car of a particular model. However, in most cases the model of the car would not be part of the metadata associated with the multimedia content (image). Moreover, the car shown in an image may be at angles different from the angles of a specific photograph of the car that is available as a search item. The signature generated for that image would enable accurate recognition of the model of the car because the signatures generated for the multimedia content elements, according to the disclosed embodiments, allow for recognition and classification of multimedia content elements, such as, content-tracking, video filtering, multimedia taxonomy generation, video fingerprinting, speech-to-text, audio classification, element recognition, video/image search and any other application requiring content-based signatures generation and matching for large content volumes such as, web and other large-scale databases.

The signatures generated for more than one multimedia content element that relate to the brand are clustered. The clustered signatures are used to determine the context, and thereby the sentiment of the brand. The sentiment determined to the brand is saved in the data warehouse 160 (or any other database that may be connected to the brand-analyzer 130). The trendiness of a brand's sentiment is determined respective of previously determined sentiments as stored in the database. For example, the sentiment of the brand may trend from a positive to a negative sentiment over time, or vice versa.

FIG. 2 depicts an exemplary and non-limiting flowchart 200 describing the process of matching an advertisement to multimedia content displayed on a web-page. At S205, the method starts when a web-page is uploaded to one of the web-browsers (e.g., web browser 120-1). In S210, a request to match at least one multimedia content element contained in the uploaded web-page of an appropriate advertisement item is received. The request can be received from a publisher server, a script running on the uploaded web-page, or an agent (e.g., an add-on) installed in the web browser. S210 can also include extracting the multimedia content elements for a signature that should be generated.

In S220, at least one signature for the multimedia content element executed from the web page is generated. The signature for the multimedia content element generated by a signature generator is described below with respect to FIGS. 3 and 4. In one embodiment, based on the generated signatures, the context of the multimedia content elements related to a trend, and thereby the brand sentiment, are determined as described below with reference to FIG. 5.

In S230, an advertisement item is matched to the multimedia content element respective of its generated signatures and/or the determined context. According to one embodiment, the matching process includes searching for at least one advertisement item respective of the signature of the multimedia content and a display of the at least one advertisement item within the display area of the web-page. According to another embodiment, the signatures generated for the multimedia content elements are clustered and the cluster of signatures is matched to one or more advertisement items. According to yet another embodiment, the matching of an advertisement to a multimedia content element can be performed by the computational cores that are part of a large scale matching discussed in detail below.

In S240, upon a users gesture the advertisement item is uploaded to the web-page and displayed therein. The user's gesture may be: a scroll on the multimedia content element, a press on the multimedia content element, and/or a response to the multimedia content. This ensures that the user's attention is given to the advertised content. In S250, it is checked whether there are additional requests to analyze multimedia content elements, and if so, execution continues with S210; otherwise, execution terminates.

As a non-limiting example for the operation of the process shown in FIG. 2, a user uploads a web-page that contains an image of a sea shore. The image is then analyzed and a signature is generated respective thereto. Respective of the image signature, an advertisement item (e.g., a banner) is matched to the image, for example, a swimsuit advertisement. Upon detection of a user's gesture, for example, a mouse scrolling over the sea shore image, the swimsuit ad is displayed.

FIGS. 3 and 4 illustrate the generation of signatures for the multimedia content elements by the SGS 140 according to one embodiment. An exemplary high-level description of the process for large scale matching is depicted in FIG. 3. In this example, the matching is for a video content.

Video content segments 2 from a Master database (DB) 6 and a Target DB 1 are processed in parallel by a large number of independent computational Cores 3 that constitute an architecture for generating the Signatures (hereinafter the “Architecture”). Further details on the computational Cores generation are provided below. The independent Cores 3 generate a database of Robust Signatures and Signatures 4 for Target content-segments 5 and a database of Robust Signatures and Signatures 7 for Master content-segments 8. An exemplary and non-limiting process of signature generation for an audio component is shown in detail in FIG. 4. Finally, Target Robust Signatures and/or Signatures are effectively matched, by a matching algorithm 9, to Master Robust Signatures and/or Signatures database to find all matches between the two databases.

To demonstrate an example of the signature generation process, it is assumed, merely for the sake of simplicity and without limitation on the generality of the disclosed embodiments, that the signatures are based on a single frame, leading to certain simplification of the computational cores generation. The Matching System is extensible for signatures generation capturing the dynamics in-between the frames.

The Signatures' generation process is now described with reference to FIG. 4. The first step in the process of signatures generation from a given speech-segment is to breakdown the speech-segment to K patches 14 of random length P and random position within the speech segment 12. The breakdown is performed by the patch generator component 21. The value of the number of patches K, random length P and random position parameters is determined based on optimization, considering the tradeoff between accuracy rate and the number of fast matches required in the flow process of the brand-analyzer 130 and SGS 140. Thereafter, all the K patches are injected in parallel into all computational Cores 3 to generate K response vectors 22, which are fed into a signature generator system 23 to produce a database of Robust Signatures and Signatures 4.

In order to generate Robust Signatures, i.e., Signatures that are robust to additive noise L (where L is an integer equal to or greater than 1) by the Computational Cores 3 a frame ‘i’ is injected into all the Cores 3. Then, Cores 3 generate two binary response vectors: {right arrow over (S)} which is a Signature vector, and {right arrow over (RS)} which is a Robust Signature vector.

For generation of signatures robust to additive noise, such as White-Gaussian-Noise, scratch, etc., but not robust to distortions, such as crop, shift and rotation, etc., a core Ci={ni} (1≦i≦L) may consist of a single leaky integrate-to-threshold unit (LTU) node or more nodes. The node ni equations are:

$V_{i} = {\sum\limits_{j}\; {w_{ij}k_{j}}}$ ni = (Vi-Thx)

where, is a Heaviside step function; wij is a coupling node unit (CNU) between node i and image component j (for example, grayscale value of a certain pixel j); kj is an image component ‘j’ (for example, grayscale value of a certain pixel j); ThX is a constant Threshold value, where ‘x’ is ‘S’ for Signature and ‘RS’ for Robust Signature; and Vi is a Coupling Node Value.

The Threshold values ThX are set differently for Signature generation and for Robust Signature generation. For example, for a certain distribution of Vi values (for the set of nodes), the thresholds for Signature (ThS) and Robust Signature (ThRS) are set apart, after optimization, according to at least one or more of the following criteria:

-   -   1: For:

V_(i)>Th_(RS)

1−p(V>Th _(S))−1−(1−ε)^(l)<<1

i.e., given that I nodes (cores) constitute a Robust Signature of a certain image I, the probability that not all of these I nodes will belong to the Signature of same, but noisy image, Ĩ is sufficiently low (according to a system's specified accuracy).

-   -   2:

p(V _(i) >Th _(RS))≈l/L

i.e., approximately I out of the total L nodes can be found to generate a Robust Signature according to the above definition.

-   -   3: Both Robust Signature and Signature are generated for certain         frame i.

It should be understood that the generation of a signature is unidirectional, and typically yields lossless compression, where the characteristics of the compressed data are maintained but the uncompressed data cannot be reconstructed. Therefore, a signature can be used for the purpose of comparison to another signature without the need of comparison to the original data. The detailed description of the Signature generation can be found in U.S. Pat. Nos. 8,326,775 and 8,312,031, assigned to common assignee, which are hereby incorporated by reference for all the useful information they contain.

A Computational Core generation is a process of definition, selection, and tuning of the parameters of the cores for a certain realization in a specific system and application. The process is based on several design considerations, such as:

-   -   (a) The Cores should be designed so as to obtain maximal         independence, i.e., the projection from a signal space should         generate a maximal pair-wise distance between any two cores'         projections into a high-dimensional space.     -   (b) The Cores should be optimally designed for the type of         signals, i.e., the Cores should be maximally sensitive to the         spatio-temporal structure of the injected signal, for example,         and in particular, sensitive to local correlations in time and         space. Thus, in some cases a core represents a dynamic system,         such as in state space, phase space, edge of chaos, etc., which         is uniquely used herein to exploit their maximal computational         power.     -   (c) The Cores should be optimally designed with regard to         invariance to a set of signal distortions, of interest in         relevant applications.

A detailed description of the Computational Core generation and the process for configuring such cores is discussed in more detail in the co-pending U.S. patent application Ser. No. 12/084,150 referenced above.

FIG. 5 is a non-limiting and exemplary flowchart 500 describing a method for determining a sentiment of a particular brand according to one embodiment. In S510, a request to monitor a brand is received. The request may include at least one multimedia content element respective of the brand. A multimedia content element may be, for example, an image, a graphic, a video stream, a video clip, an audio stream, an audio clip, a video frame, a photograph, an image of signals, combinations thereof, and portions thereof.

In S520, at least one signature is generated for each multimedia content element that is received. The at least one signature is robust to noise and distortions and is generated by the SGS 140 as described in greater detail above. The brand in the received multimedia content element is identified by the generated signature(s)

In S530, a search is performed for one or more multimedia content elements in which the brand may be identified. According to one embodiment, the search may be performed by crawling one or more web sources and/or web platforms to identify the existence of multimedia content elements that relate to the brand, for example, elements that mention, show, and/or describe, the brand. As a non-limiting example, the crawling may be performed through social media networks, web sites, blogs, news feeds, multimedia channels, or any platform in which the brand may be advertised and mentioned.

In S540, at least one signature is generated for each multimedia content element encountered during the search. Such signatures are also created by the SGS 140. In S545, it is checked if at least one of the multimedia content elements encountered during the search is related by reference to the brand which requested to be monitored. According to one embodiment, S545 includes comparing the at least one signature generated in S520 to the least one signature generated in S540; if the signatures are substantially similar, then it is determined that the brand is mentioned in the specific encountered multimedia element.

In S550, the signatures of those multimedia elements that are related to the brand are marked. In S555, the context of the marked signatures is determined by correlating their respective concepts as discussed above.

In S560, the sentiment of the brand is determined using the context. According to one embodiment, S560 includes identification of a strong context with respect to a certain sentiment value (e.g., positive, natural, or negative) by checking if a predefined number of concepts satisfy the same predefined condition. The predefined condition is set respective of a certain sentiment value. For example, if 70% of the concepts can be considered as trending towards a positive sentiment, then a strong context is established. A strong context can be also established based on the volume of the appearances of the brand in the crawled sources, that is, if the total number of related concepts exceeds a predefined threshold.

According to one embodiment the sentiment of the brand can be determined by correlating the concept generated for the brand with other concepts to determine if the brand has a positive, natural or negative connotation with respect to the other concept. The correlation can be performed using probabilistic models. According to another embodiment the trendiness of a brand's sentiment is also determined based on previously determined sentiments as stored in the database.

In S565, the determined sentiment for the brand is saved in a database (e.g., data warehouse 160). According one embodiment, the determined sentiment is saved in an entry that also maintains the brand name, the marked signatures (S550), and a time stamp. In S570, it is checked whether there are additional requests and if so execution continues with S510; otherwise, execution terminates.

In one embodiment, the trendiness is determined by evaluating changes in the sentiment values of a specific brand over time by analyzing the sentiment values and their time stamps as recorded in the database.

The various embodiments disclosed herein can be implemented as hardware, firmware, software, or any combination thereof. Moreover, the software is preferably implemented as an application program tangibly embodied on a program storage unit or computer readable medium consisting of parts, or of certain devices and/or a combination of devices. The application program may be uploaded to, and executed by, a machine comprising any suitable architecture. Preferably, the machine is implemented on a computer platform having hardware such as one or more central processing units (“CPUs”), a memory, and input/output interfaces. The computer platform may also include an operating system and microinstruction code. The various processes and functions described herein may be either part of the microinstruction code or part of the application program, or any combination thereof, which may be executed by a CPU, whether or not such a computer or processor is explicitly shown. In addition, various other peripheral units may be connected to the computer platform such as an additional data storage unit and a printing unit. Furthermore, a non-transitory computer readable medium is any computer readable medium except for a transitory propagating signal.

All examples and conditional language recited herein are intended for pedagogical purposes to aid the reader in understanding the principles of the invention and the concepts contributed by the inventor to furthering the art, and are to be construed as being without limitation to such specifically recited examples and conditions. Moreover, all statements herein reciting principles, aspects, and embodiments of the invention, as well as specific examples thereof, are intended to encompass both structural and functional equivalents thereof. Additionally, it is intended that such equivalents include both currently known equivalents as well as equivalents developed in the future, i.e., any elements developed that perform the same function, regardless of structure. 

What is claimed is:
 1. A method for matching an advertisement item to multimedia content elements based on sentiments, comprising: extracting at least one multimedia content element from a web-page requested for display on a user node; generating a signature for each of the at least one multimedia content element, wherein each signature represents a concept, wherein each concept is an abstract description of one of the at least one multimedia content element; correlating the concepts of the generated signatures to determine a context of the at least one multimedia content element, wherein the context indicates at least a brand sentiment; searching for at least one advertisement item based on the signatures and the context; and causing a display of the at least one advertisement item within a display area of the web-page.
 2. The method of claim 1, further comprising: storing the context, a time stamp, and the generated signatures in a database.
 3. The method of claim 1, wherein correlating the concepts of the generated signatures to determine a context of the at least one multimedia content element further comprises: establishing a strong context, wherein the brand sentiment is set based on the strong context.
 4. The method of claim 3, wherein the strong context is established based on at least one of: a volume of appearances of the brand throughout a plurality of web sources including a plurality of multimedia content elements, and a number of concepts satisfying a predefined condition being set respective of a particular brand sentiment.
 5. The method of claim 4, wherein the particular brand sentiment is any of: a positive sentiment, a neutral sentiment, and a negative sentiment.
 6. The method of claim 5, wherein the displayed at least one advertisement is associated with a positive sentiment.
 7. The method of claim 1, wherein the at least one advertisement item is displayed when a user gesture of a user is detected by a user node.
 8. The method of claim 7, wherein the user gesture is any of: a scroll on the media content, a press on the media content, and a response to the media content.
 9. The method of claim 1, further comprising: clustering the generated signatures into a signature cluster, wherein the at least one advertisement is searched for based further on the signature cluster.
 10. A non-transitory computer readable medium having stored thereon instructions for causing one or more processing units to execute the method according to claim
 1. 11. A system for matching an advertisement item to a multimedia content element based on sentiments, comprising: a processing unit; and a memory, the memory containing instructions that, when executed by the processing unit, configures the system to: extract at least one multimedia content element from a web-page requested for display on a user node; generate a signature for each of the at least one multimedia content element, wherein each signature represents a concept, wherein each concept is an abstract description of one of the at least one multimedia content element; correlate the concepts of the generated signatures to determine a context of the at least one multimedia content element, wherein the context indicates at least a brand sentiment; search for at least one advertisement item based on the signatures and the context; and cause a display of the at least one advertisement item within a display area of the web-page.
 12. The system of claim 11, wherein the system is further configured to: store the brand sentiment, a time stamp, and the generated signatures in a database.
 13. The system of claim 11, wherein the system is further configured to: establish a strong context, wherein the brand sentiment is set based on the strong context.
 14. The system of claim 13, wherein the strong context is established based on at least one of: a volume of appearances of the brand throughout a plurality of web sources including a plurality of multimedia content elements, and a number of concepts satisfying a predefined condition being set respective of a particular brand sentiment.
 15. The system of claim 14, wherein the particular brand sentiment is any of: a positive sentiment, a neutral sentiment, and a negative sentiment.
 16. The system of claim 15, wherein the displayed at least one advertisement is associated with a positive sentiment.
 17. The system of claim 11, wherein the at least one advertisement item is displayed when a user gesture of a user is detected by a user node.
 18. The system of claim 17, wherein the user gesture is any of: a scroll on the media content, a press on the media content, and a response to the media content.
 19. The system of claim 11, wherein the system is further configured to: cluster the generated signatures into a signature cluster, wherein the at least one advertisement is searched for further based on the signature cluster. 